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I added Guar gum and xanthane gum when I made ice cream, but 15% of it still melted before I put the ice cream in the fridge.

What ingredients can I use to prevent my ice cream from melting this fast?

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What type of container do you have the ice cream in? –  Young Guilo Aug 24 '13 at 9:44
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1 Answer

Hydrocolloids like Guar and Xanthan gum don't prevent the ice cream from melting, rather they change the texture (more like jello). There are other ice cream additives. Instead, I'd recommend optimizing the physics before enlisting chemical help.

What happens is that the ice cream batter mixture warms up during the churning process and loses consistency (melts). The best defence against melting ice cream is working in lower temperatures:

  • Make sure the ice cream maker bowl/machine is properly cold (-16°C, or 0°F minimum). Get it as cold as you can get it.
  • Put your ice cream batter in the freezer for half an hour to an hour before making the ice cream to keep it just above the freezing point.
  • Working in a colder room helps as well.

You should be able to get great results using these simple steps, however, if it still looks like a losing battle, you can also try pre-cooling your churing bowl with dry ice. (if you throw the dry ice in the ice cream batter, you may get a tangy ice cream).

Afterwards, put the remainder of the dry ice in a container next to your machine and cover them both loosely with a tarp (keep the place ventilated) to keep the air around the ice cream batter and machine cold.

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One other common mistake: don't use a heavy (glass) storage container at room temperature. I'll melt a lot right when you transfer it. Use something lighter, or pre-chill the container. –  Jefromi Aug 24 '13 at 15:50
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